Official Textbook for the Astronomy and Space Examination 2021-2022 Edition: Levels 2, 3, and 4 Price: 1900 yen Official Question Collection for the Astronomy and Space Examination 2022-2023 Edition Price: 1800 yen Set of 4 books ☆ They are in beautiful condition with no writing or stains. Would you like to use them for studying for the Astronomy and Space Examination? ^ ^ Please refrain from purchasing if you are sensitive to used items, as they are stored at home. I am not currently considering selling them individually.